Vise slide



P. H. D. WALKER.

, VISE SLIDE.

APPLICATION FILED MAYI, 1921.

Patented June 27, 1922.

IN VEN TOR.

- UNITED STATES PATENT o lcaI PERCY H. i). WALKER, or MERIDEN, CONNECTICUT, .assreivon To THE CnArtLEs PARKER COMPANY, or MERIDEN, CONNECTICUT, A conronnrron NECTICIIT.

T 0 all w-h'omit mag concern;

Be it known that I, PERCY D. IVAIJKER, a citizen of the United States, residing at Meriden, county of F airfield, State of Connecticut, have invented an Improvement in Vise Slides, of which the following is a specification.

The present invention relates to clamp jaws, such, for example, as are found in Vises and has to do more especially with reinforcing or strengthening means therefor. The object of my invention is to provide a device of the above character which shall be of simple and inexpensive construction, yet less liable to break on the application of heavy stresses. To these and other ends my invention consists in certain improvements and combination of parts as will be pointed out with greater particularity in the claims appended to this specification.

Referring to the drawing,

Fig. 1 shows a profile cross-section of my invention embodied in a vise.

Fig. 2 is a front view of the device shown by Fig. 1.

Fig. 3 is a section on the line 3-3 or Fig. 1.

Fig. 4 is a View similar to Fig. 3 but showing a modified construction.

Devices of the aforementioned type have been found to fail through rupture of one of the jaws near the base thereof. This is especially true of the movable jaw which is often made of less rigid construction in order to be of light weight and neat appearance.

In the drawing the numeral 10 indicates a fixed jaw of an ordinary vise, and numeral 11 indicates the complementary or movable jaw whose base portion is provided with a rearwardly extending base or slide 12 having a channel 23 therein, in which turns the usual screw 11 operated by the handle 13 and cooperating with the stationary nut 15 to actuate the movable jaw 11 to open and close the vise. The screw 14 may be retained in the channeled base of the movable jaw by some conventional retaining means, such, for example, as the saddle 20 secured in place by the saddle screw 21 to enable the plate to cooperate with the collar 22 on the screw. As the jaws are tightly clamped together, the rear portion of the movable jaw 11 is subjected to tensile stresses while the front or left-hand portion thereof, as at 31, is under VISE sLrnn.

' Specification of Letterslaten-t. Patented Application filed May 7, 1921. Serial No. 467,743.

conipression. Inasmuch as the jaws 10 and 11 :are usually made of cast material, I have found that a reinforcing bar of steel or "other material having a greater strength than the cast metal may be made to project upwardly into the movable jaw to prevent the likelihood of rupture occurring adjacent the base or slide of said jaw where the bending moment is a maximum; In the embodiment of my invention represented by Figure 1 I have shown the reinforcing bar as projecting entirely through the slide as shown at 16. With the strengthening bar curved upwardly to an apex 17 in the movable jaw, it will be apparent that the rear portion 18' of the arcuate or horseshoe shaped bar is subjected to tension while the opposite or front portion 19 thereof has compressive stresses applied thereto.

Figure 4 indicates a modified form of my invention in which the reinforcing bar 16 is disposed in the slide 12 so as to form the roof of the channel 23. In either the form shown by Figure 3 or that shown by Figure 4 the reinforcing or strengthening member is preferably molded or cast inside the jaw 11 and the slide 12. It will be apparent that other shapes and disposition may be made of the strengthening member without departing from the spirit of my invention.

I claim:

1. In a device of the class described, a casting provided with an arched reinforcing member of greater strength than the casting, imbedded therein and arranged to have the normal fiexural stresses produce a tension on one side of the arch in said member, and a compression on the opposite side thereof.

2. A clamping jaw having a supporting slide and provided adjacent said supporting slide with a reinforcing member of substantially inverted U-shape in profile crosssection.

3. A vise provided with a cast metal jaw having imbedded therein a reinforcing member of greater strength than the cast metal and of substantially inverted U-shape, said member being adapted when the vise is in operation to have tension stresses applied to one leg and compressive stresses applied to the other leg.

4. In a vise, the combination with a cast metal clamping jaw, of a strengthening material within said jaw, a portion of said within said slide and curved upwardly and then downwardly in said jaw to form an arch in profile cross-section.

6. A vise jaw having imb'edded therein a reinforcing member of greater strength than the metal of the jaw and of substantially inverted U-shape, said member being so placed in the jaw that when the jaw is under strain in operation, tension strains will be applied longitudinally of one leg and compressive strains will be applied longitudinally of the other leg of said member.

In testimony whereof I aflix my signature.

PERCY H. D. WALKER. 

